16.H2O (water) and NaCl (salt) are _ that are in salt water, which is a(n) . Water and salt contain the __ hydrogen, oxygen, sodium, and chlorine. Compounds; mixture; elements
Mixture; compounds; elements
Element; compounds; mixture
Compound; elements; compounds

12.The number of _ determines which element it is.

electrons
protons
positrons
neutrons

Answers

Answer 1

Answer: #1...Mixture; compounds; elements
#2...Protons

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What does the frequency of a wave represent

Answers

Answer:

Explanation:

Frequency is a magnitude that measures the number of repetitions/time of a wave.

Let's remember that a wave is a periodic movement whose propagation develops in a vacuum or in a physical environment.

the number of waves passing in a certain amount of time

What turns colour in an acid and base

Answers

Answer:

Chemists use a solution called Universal Indicator to identify acids and bases. ... The Universal Indicator Color Guide shows that Universal Indicator turns red when it is added to a strong acid, it turns purple when it is added to a strong base, and it turns a yellowish-green when it is added to a neutral solution.

Explanation:

Answer:

Phenolphthalein

Explanation:

An atom of chlorine has several valence electrons in itsa. second shell.
b. first shell. End of exam
c. third shell.
d. nucleus.

Answers

An atom of chlorine has several valence electrons in its third shell.

So, option C is correct one.

What is valence electron?

The electron/electrons present in the valence shell (outermost shell)of an atom is called valence electrons.

The chlorine atom have 7 valence electrons.
The chlorine atom has only 2 electrons in its first shell, then 8 electrons in second shell and 7 electrons in its third shell.

learn about valence electrons

brainly.com/question/13993867

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The correct answer is c) third shell,
The atom of chlorine has only 2 electrons in its first shell, then 4 electrons in second shell and finally 8 electrons in its third.

Which compounds are classified as electrolytes? (1) KNO3 and H2SO4 (3) CH3OCH3 and H2SO4 (2) KNO3 and CH3OH (4) CH3OCH3 and CH3OH

Answers

KNO₃ and H₂SO₄ are classified as electrolytes since they dissociate in water. KNO₃ in water goes to K₊ and NO₃⁻. H₂SO₄ in water can be thought of as going to 2H⁺ and SO₄²⁻ but later on you will learn that when placed into water, H₂SO₄ actually forms H₊, HSO₄⁻, and SO₄²⁻ since HSO₄⁻ is a weak acid and won't dissociate completely.
I hope this helps and if anything is unclear feel free to ask about it in the comments.

Ight I just here’s my first one

Answers

Answer:

Explanation:

Studies suggest that consumption of large amounts of red and processed meats, along with low intake of fiber and phytochemicals, may be responsible for which one of the following forms of cancer?A. Liver
B. Kidney
C. Colorectal
D. Stomach

Answers

C. Colorectal

Studies suggest that consumption of large amounts of red and processed meats, along with low intake of fiber and phytochemicals, may be responsible for colorectal.

NOT:
A. Liver
B. Kidney
D. Stomach

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